One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10,12,14)(11,13,15,16)(17,18,22,21)(19,25,27,23)(20,28,29,24)(26,30,32,31)(34,38)(35,41)(36,44)(46,48)(4,8)(6,7)(18,21)(20,29)(23,25)(26,32)(33,34,37,38)(35,42,41,39)(36,45,44,40)(43,46,47,48)(2,3)(6,7)(17,19,22,27)(18,23,21,25)(20,26,29,32)(24,30,28,31)(33,34)(35,39)(36,45)(37,38)(40,44)(41,42)(43,48)(46,47)(1,3,5,2)(4,7,8,6)(9,10)(11,13)(12,14)(15,16)(17,20,22,29)(18,24,21,28)(19,26,27,32)(23,30,25,31)(33,35,37,41)(34,39,38,42)(36,43,44,47)(40,46,45,48)(1,4,5,8)(2,6,3,7)(9,11,12,15)(10,13,14,16)(17,21,22,18)(19,23,27,25)(20,28,29,24)(26,30,32,31)(33,36,37,44)(34,40,38,45)(35,43,41,47)(39,46,42,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.